HR Diagram

Front

What is the HR Diagram?

Back

The HR Diagram (Hertzsprung-Russell Diagram) is a scatter plot that shows the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What does the x-axis of the HR Diagram represent?

Back

The x-axis represents the temperature of stars, which decreases from left to right.

Front

What does the y-axis of the HR Diagram represent?

Back

The y-axis represents the luminosity of stars, often expressed in terms of the Sun's luminosity.

Front

What type of stars are found on the Main Sequence?

Back

Main Sequence stars are those that are in the stable phase of hydrogen burning, including stars like our Sun.

Front

Which color of star is the hottest?

Back

Blue stars are the hottest.

Front

Which color of star is the coolest?

Back

Red stars are the coolest.

Front

What is a Red Giant?

Back

A Red Giant is a late stage in a star's life cycle where it has expanded and cooled, resulting in a reddish appearance.

Front

What is a White Dwarf?

Back

A White Dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers.

Front

What is a Supernova?

Back

A Supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle, often resulting in the formation of a neutron star or black hole.

Front

What are the two main types of galaxies?

Back

The two main types of galaxies are spiral galaxies and elliptical galaxies.